netdev - Re: [PATCH net] i40e: fix the calculation of VFs mac addresses

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Message-ID: <ee877b4f-5894-69f8-5d70-2d2f137cf66e@oracle.com>
Date:   Tue, 7 Nov 2017 10:20:29 -0800
From:   Tushar Dave <tushar.n.dave@...cle.com>
To:     Nicolas Dichtel <nicolas.dichtel@...nd.com>,
        jeffrey.t.kirsher@...el.com
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        Zijie Pan <zijie.pan@...nd.com>,
        Anjali Singhai Jain <anjali.singhai@...el.com>,
        Andrew Bowers <andrewx.bowers@...el.com>
Subject: Re: [PATCH net] i40e: fix the calculation of VFs mac addresses



On 11/07/2017 08:32 AM, Nicolas Dichtel wrote:
> From: Zijie Pan <zijie.pan@...nd.com>
> 
> num_mac should be increased only after the call to i40e_add_mac_filter().
> 
> Fixes: 5f527ba962e2 ("i40e: Limit the number of MAC and VLAN addresses that can be added for VFs")
> CC: Anjali Singhai Jain <anjali.singhai@...el.com>
> CC: Andrew Bowers <andrewx.bowers@...el.com>
> Signed-off-by: Zijie Pan <zijie.pan@...nd.com>
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> ---
>   drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 21 +++++++++++----------
>   1 file changed, 11 insertions(+), 10 deletions(-)
> 
Thanks for fix.
Reviewed-by: Tushar Dave <tushar.n.dave@...cle.com>

> diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> index 4d1e670f490e..2d1f3dbe67f1 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> @@ -2115,18 +2115,19 @@ static int i40e_vc_add_mac_addr_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
>   		struct i40e_mac_filter *f;
>   
>   		f = i40e_find_mac(vsi, al->list[i].addr);
> -		if (!f)
> +		if (!f) {
>   			f = i40e_add_mac_filter(vsi, al->list[i].addr);
>   
> -		if (!f) {
> -			dev_err(&pf->pdev->dev,
> -				"Unable to add MAC filter %pM for VF %d\n",
> -				 al->list[i].addr, vf->vf_id);
> -			ret = I40E_ERR_PARAM;
> -			spin_unlock_bh(&vsi->mac_filter_hash_lock);
> -			goto error_param;
> -		} else {
> -			vf->num_mac++;
> +			if (!f) {
> +				dev_err(&pf->pdev->dev,
> +					"Unable to add MAC filter %pM for VF %d\n",
> +					al->list[i].addr, vf->vf_id);
> +				ret = I40E_ERR_PARAM;
> +				spin_unlock_bh(&vsi->mac_filter_hash_lock);
> +				goto error_param;
> +			} else {
> +				vf->num_mac++;
> +			}
>   		}
>   	}
>   	spin_unlock_bh(&vsi->mac_filter_hash_lock);
>